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Date: Wed, 19 Nov 2014 20:36:08 +0800
From: Zidan Wang <b50113@...escale.com>
To: <broonie@...nel.org>
CC: <lgirdwood@...il.com>, <perex@...ex.cz>, <tiwai@...e.de>,
<lars@...afoo.de>, <ckeepax@...nsource.wolfsonmicro.com>,
<Li.Xiubo@...escale.com>, <patches@...nsource.wolfsonmicro.com>,
<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
Zidan Wang <b50113@...escale.com>
Subject: [alsa-devel][PATCH] ASoC: wm8960: Add shared_lrclk and capless to device tree
wm8960 codec has a wm8960_data struct which has two fields shared_lrclk and capless.
The wm8960_data is get from platform_data and it is reasonable to set it from device
tree when platform_data is null.
And when shared_lrclk is set, LRCM will be enabled. But the following software reset
in wm8960_probe will reset it to the default state. So LRCM operation should after
software reset.
Signed-off-by: Zidan Wang <b50113@...escale.com>
---
sound/soc/codecs/wm8960.c | 49 ++++++++++++++++++++++++++++++-----------------
1 file changed, 31 insertions(+), 18 deletions(-)
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
index 4dc4e85..1d56c90 100644
--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -125,6 +125,7 @@ struct wm8960_priv {
struct snd_soc_dapm_widget *out3;
bool deemph;
int playback_fs;
+ struct wm8960_data pdata;
};
#define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
@@ -961,17 +962,13 @@ static int wm8960_resume(struct snd_soc_codec *codec)
static int wm8960_probe(struct snd_soc_codec *codec)
{
struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
- struct wm8960_data *pdata = dev_get_platdata(codec->dev);
+ struct wm8960_data *pdata = &wm8960->pdata;
int ret;
- wm8960->set_bias_level = wm8960_set_bias_level_out3;
-
- if (!pdata) {
- dev_warn(codec->dev, "No platform data supplied\n");
- } else {
- if (pdata->capless)
- wm8960->set_bias_level = wm8960_set_bias_level_capless;
- }
+ if (pdata->capless)
+ wm8960->set_bias_level = wm8960_set_bias_level_capless;
+ else
+ wm8960->set_bias_level = wm8960_set_bias_level_out3;
ret = wm8960_reset(codec);
if (ret < 0) {
@@ -979,6 +976,14 @@ static int wm8960_probe(struct snd_soc_codec *codec)
return ret;
}
+ if (pdata->shared_lrclk) {
+ ret = snd_soc_update_bits(codec, WM8960_ADDCTL2, 0x4, 0x4);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to enable LRCM: %d\n", ret);
+ return ret;
+ }
+ }
+
wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Latch the update bits */
@@ -1029,6 +1034,18 @@ static const struct regmap_config wm8960_regmap = {
.volatile_reg = wm8960_volatile,
};
+static void wm8960_set_pdata_from_of(struct i2c_client *i2c,
+ struct wm8960_data *pdata)
+{
+ const struct device_node *np = i2c->dev.of_node;
+
+ if (of_property_read_bool(np, "capless"))
+ pdata->capless = true;
+
+ if (of_property_read_bool(np, "shared_lrclk"))
+ pdata->shared_lrclk = true;
+}
+
static int wm8960_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -1038,6 +1055,7 @@ static int wm8960_i2c_probe(struct i2c_client *i2c,
wm8960 = devm_kzalloc(&i2c->dev, sizeof(struct wm8960_priv),
GFP_KERNEL);
+
if (wm8960 == NULL)
return -ENOMEM;
@@ -1045,15 +1063,10 @@ static int wm8960_i2c_probe(struct i2c_client *i2c,
if (IS_ERR(wm8960->regmap))
return PTR_ERR(wm8960->regmap);
- if (pdata && pdata->shared_lrclk) {
- ret = regmap_update_bits(wm8960->regmap, WM8960_ADDCTL2,
- 0x4, 0x4);
- if (ret != 0) {
- dev_err(&i2c->dev, "Failed to enable LRCM: %d\n",
- ret);
- return ret;
- }
- }
+ if (pdata)
+ memcpy(&wm8960->pdata, pdata, sizeof(struct wm8960_data));
+ else if (i2c->dev.of_node)
+ wm8960_set_pdata_from_of(i2c, &wm8960->pdata);
i2c_set_clientdata(i2c, wm8960);
--
1.9.1
--
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